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Ingenium, 1987.2107.002
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OBJECT TYPE: N/A
DATE: 1900–1940
ARTIFACT NUMBER: 1987.2107.002

MANUFACTURER: Berger, C.L. & Sons
MODEL: Unknown
LOCATION: Boston, Massachusetts, United States of America

More Information

General Information

Serial #: N/A
Part Number: 2
Total Parts: 3
AKA: N/A
Patents: N/A
General Description: IRON BASE & TRIER PLATFORM; GERMAN SILVER SCALES; BRASS FITTINGS. CASE IS WOOD & GLASS, WITH CAST METAL ADJUSTMENT KNOBS/ (NB: NICKEL OR GERMAN SILVER IS AN ALLOY OF COPPER, NICKEL & ZINC; IT CONTAINS NO SILVER)

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length: 63.5 cm
Width: 22.8 cm
Height: 29.0 cm
Thickness: N/A
Weight: N/A
Diameter: N/A
Volume: N/A

Lexicon

Group: Astronomy
Category: Miscellaneous
Sub-Category: N/A

Manufacturer

AKA: Berger
Country: United States of America
State/Province: Massachusetts
City: Boston

Context

Country: Canada
State/Province: Unknown
Period: PROBABLY USED C. 1900-1950S
Canada: USED BY TOPOGRAPHICAL SURVEY OF CANADA TO COLLIMATE SURVEY INSTRUMENTS. MODIFIED DESIGNINCLUDING LEVEL ON BASE & AUXILLIARY SCREW BELOW MICROMETER SCREW SUGGESTS THIS TRIER MAY HAVE BEEN USED FOR ASTRONOMICAL INSTRUMENTS (CAPABLE OF PRECISE MEASUREMENT). (REF.1, P.125)
Function: TO TEST THE SENSITIVITY & REGULARITIY OF CURVATURE OF BUBBLE OR SPIRIT LEVELS.
Technical: PRECISION INSTRUMENT OF SIMPLE DESIGN WHICH PERMITS MEASUREMENT OF SENSITIVITY OF A LEVEL AS EXPRESSED IN SECONDS OF ARC, AND REGULARITY OF CURVATURE OF SPIRIT LEVELS, AS INDICATED BY UNIFORM RUN OF BUBBLE. TRIER'S DESIGN PERMITS TESTING OF SPIRIT LEVELS ALONE, OR AS MOUNTED ON AN INSTRUMENT. FEATURES AUXILLARY SCREW ON BASE, ENABLING TRIER TO TEST LEVELS OF HIGHEST GRADE OF PRECISION, IN REPETITION TESTING.
Area Notes: Unknown

Details

Markings: .2 'C.L. Berger & Sons/ Boston, U.S.A.' INCISED ON MICROMETER HEAD; GRADUATED 0-90, IN BOTH DIRECTIONS, BY SINGLE DIVISIONS. REFERENCE POST DIVIDED 0-35 IN INCREMENTS OF 5/.3 CASE. DECAL INSIDE COVER INCOMPLETE; READS: 'MAN[UFACTUR]ED BY/ R.A. [.__R]OULE/ O[TTA]WA.'
Missing: EXTENSION Y-SUPPORT BRACKET
Finish: .1-.2 DARK GREEN ENAMELLED FINISH/ BLACK PAINTED BORDER. SOME PARTS HAVE BRIGHT LACQUERED FINISH.
Decoration: N/A

CITE THIS OBJECT

If you choose to share our information about this collection object, please cite:

Berger, C.L. & Sons, Platform, circa 1900–1940, Artifact no. 1987.2107, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1987.2107.002/

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